[Openstack-stable-maint] Stable check of openstack/oslo.messaging for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/1d9ba24e195e451580bb11f9d4af90... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/90de9bcda08e4ec19fd6dba1606b8d43 : SUCCESS in 4m 18s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/046c9240e6df456dac8c3820274792ca : SUCCESS in 6m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/dfe0ca6f244f47d7be6fc33101fb90fd : SUCCESS in 5m 48s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/652c2f12279843e6b012116826a48388 : FAILURE in 6m 04s